Over the years I’ve heard “it’s the same but backward and at night”. The most egregious of these is by far Assault on the Control Room and Two Betrayals - often cited as the biggest example of recycled content in Halo: CE.
The Maw feels like an entirely different level set in the same setting as Pillar of Autumn. For example Keyes has you returning to Truth and Reconciliation in a much more damaged state and has you jumping in and out of the ship at different points to a unique new landscape below. you repeat those levels in different ways and at different times of day or damage states.In all cases of repeat levels marked with *^ Looking at Halo: Combat Evolved as a map list shows just which ones are reused and where.
